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Measurement of forward Z→e+e− production at s√=8TeV

Abstract : A measurement of the cross-section for Z-boson production in the forward region of pp collisions at 8TeV centre-of-mass energy is presented. The measurement is based on a sample of Z→e+e− decays reconstructed using the LHCb detector, corresponding to an integrated luminosity of 2.0fb−1. The acceptance is defined by the requirements 2.0<η<4.5 and pT>20GeV for the pseudorapidities and transverse momenta of the leptons. Their invariant mass is required to lie in the range 60--120GeV. The cross-section is determined to be σ(pp→Z→e+e−)=93.81±0.41(stat)±1.48(syst)±1.14(lumi)pb, where the first uncertainty is statistical and the second reflects all systematic effects apart from that arising from the luminosity, which is given as the third uncertainty. Differential cross-sections are presented as functions of the Z-boson rapidity and of the angular variable ϕ∗, which is related to the Z-boson transverse momentum.
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http://hal.in2p3.fr/in2p3-01122527
Contributor : Sabine Starita <>
Submitted on : Wednesday, March 4, 2015 - 10:19:06 AM
Last modification on : Friday, November 6, 2020 - 11:44:14 AM

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R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Kochebina, et al.. Measurement of forward Z→e+e− production at s√=8TeV. Journal of High Energy Physics, Springer Verlag (Germany), 2015, 05, pp.109. ⟨10.1007/JHEP05(2015)109⟩. ⟨in2p3-01122527⟩

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